Caliper gauge



y 1936- I A. w JOHANSON 2,039,718

CALIPER GAUGE Filed Oct. '7, 1955 Patented May 5, 1936 UNITED STATES PATENT OFFICE CALIPER. GAUGE Anton W. Johanson, Florence, Ala.

Application October 7, 1935, Serial No. 43,943

1 Claim. (01. 33-148) This invention relates to calipers, the general The two headed members l5 and the screw l6 object of the invention being to provide a device will rotatably hold the hubs l and I together and of this nature which can be used for taking inside a. spring I! is located in a groove in the front and outside measurements, with a gauge for indimember l5 and has one end connected to a pin l8 5 cating the measurements, a spring for returning on the member A and its other end to a pin IS on 5 the parts to closed position and clamping means the member B, said spring tending to hold the for holding the parts in adjusted position. members in closed position with the extremities This invention also consists in certain other of the arms 2 and. 9 abutting and the pointer II features of construction and in the combination at the zero position on the scale, a stop pin 20 10 and arrangement of the several parts to be herebeing provided on the free end of the plate 4 for 10 inafter fully described, illustrated in the accomengagement by the plate l2 for preventing the panying drawing and specifically pointed out in parts from being moved beyond zero position. the appended claim. Thus it will be seen that I have provided a In describing the invention in detail, reference simple inexpensive device for securing both inside will be had to the accompanying drawing wherein and outside measurements, means for indicating 15 like characters denote like or corresponding parts the measurements and means for normally holdthroughout the several views, and in which: ing the parts in closed position, and clamping Figure 1 is a view of the front face of the immeans for holding the parts in adjusted position. proved device. It is thought from the foregoing description Figure 2 is asection on the line 2-2 of Figure 1. that the advantages and novel features of the 20 Figure 3 is a section on the line 3-3 of Figure 1. invention will be readily apparent. Figure 4 is a rear view of that part of the device It is to be understood that changes may be which carries the arcuate gauge plate. made in the construction and in the combination In this drawing the letter A indicates one part and arrange ent of the s v parts DIOVidBd 5 of the device which is formed with the hub I, the that such changes fall within the scope of the curved arm 2 forming one limb of the outside app Claimmeasurements caliper, the straight arm 3 which What is claimed is:- carries the arcuate plate 4 having the graduations Calipers of the class described comprising a 5 on its front face and said straight arm 3 also pair of members each including a hub, an outside has attached thereto the arm 6 which forms one caliper arm, an inside caliper arm, an arcuate 30 limb for the inside measurement caliper. scale plate carried by one member, a pointer arm The other member or part B includes the hub carried by the other member, means for pivotally l the inside caliper arm 8 and the outside caliper connecting together the hubs of the two memarm 9, it being understood that the arm 8 cooperbers, a coiled spring for holding the caliper arms ates with the arm 6 in member A and the arm 9 in closed position and clamping means carried 35 cooperates with the arm 2 in member A. by the pointer arm and engaging the scale plate The member B also includes an indicator arm I0 for clamping the parts in adjusted position, said and has its free end forming a pointer I I for pivotal means consisting of a pair of head memoooperating with the scale 5 and said free end of hers, a screw disposed through one of the head the arm in has a clamping plate l2 attached members and threaded into the other, said screw 40 thereto by the screw l3 and the pin l4, as shown being disposed through said caliper members, in Figure 3 so that by tightening the screw the one of said head members being provided with a plate 4 will be clamped between the free end of reduced portion at its inner side defining a groove the arm I0 and the plate I2, and thus the parts between itself and the adjacent caliper member 5 will be held in adjusted position and the pointer for receiving the intermediate portion of said I I will indicate on the scale the amount of movecoiled spring. ment of the caliper arms. ANTON W. J O'HANSON 

